Arthur e



(No Modell.)

. v A. E. RUST.

MEGHANIGAL MOVEMENT. v

No. 256,382. y Patented Apr..11,1882.

N. FEYERS, Plwmuxlwgnpher. wuhingmn. u. t;

l UNITED 'STATES- PATENT (Etalon.

' ARTHUR E. RUST,OF PINE MEADOW, CONNECTICUT, ASSIGNOR OF ONE-Il ALF TO SOLON R. RUST, OF SAME PLACE.

MECHANICAL MOVEMENT.

SPECIFICATION forming part ,ofLetterS Patent No. 256,382, dated April 11, 1882.

Application tiled March 4, 1882. (No model.) l I To all whom it may' concern:

Beitknownthatl, ARTHUR E. RUsT,ofPine Meadow, in the county of Litchiield and State of Connecticut, have invented a new Improvement in Mechanical Movements; and I do hereby declare the following, when taken in connection with accompanying drawings and theletters of reference marked thereon, to be a full, clear, and exact description of the same, 1o and ywhich said drawings constitute part of this specification, and represent, in-

Figure 1, a side view; Figs. 2 and 3, diagrams illustrating the operation. f

This invention relates to an improvementin I5 mechanism for converting reciprocating into rotary motion, the object being to produce two full rotary movements to each full reciprocating movement.

The device is applicable to steam-engines zo where a rapid revolution ofthe ily-wheel is desirable without a corresponding rapidity ot' movement of the piston, and is also applicable to other devices where a reciprocating movement'is to be converted into a rotary motion and the rotary motion desired to be a rapid one 5 and the invention consists in the system of levers between the pitman which receives the reciprocating movement and the crank to which that movement is transferred, as shown 3o in the accompanying illustration and more fully hereinafter described.

A represents the pitman, which for illustration' may be considered a pitman in connection with a common steam-engine piston. It is not 3 5 necessary in this specification to describe the mechanism of the engine,whereby the reciprocating movement of the piston is imparted to the pitman or connecting-rod A. Instead of being attached to the usual crank, it is at- 4o tached to an arm, a, or it may be a wheel on a rock-shaft, B. The reciprocating movement imparted to the pitman is less than the full diameter of the circle which would be described by the point b where the pitman is attachedthat is to say, it starts forward above the deadline d, as seen in Fig. 1, and terminates on the opposite side at a corresponding point,ve, also above the dead-line d, as seen in Fig. 2, so that the pitman imparts a vibratory motion to the 5o arm or wheel to which it is attached-that is to say, from the position in Fig. 1 to that in Fig. 2, and return.

C is the driving-shaft, to which the crankwheel D is attached; E, the connecting-rod,V

which is hung lto the crank D on a crank-pin, Y

f, in the usual manner for attaching connecting-rods to crank-pins.

.Midway between the rock-shaft B and the driving-shaft is a slide, L, arranged .in horizontal guides c', in the usual manner t'or' ar- 6o ranging a cross-head. To this slide a lever is hnng,'as at m, so as to swing in a plane parallel with the plane in which the cranks turn; it4 extends above the pivot to form an arm,n, to which the connecting-rod E is attached, as at l, and below to form a like arm, o. A

From the rock-shaft B an arm, p, extends up at right angles to the arm a. To this arm p, at a point, r, one end of a connecting-rod, F, is hung, the other end hung to the lever a o and 7o at its center of vibration. Diametrically opposite the arm p is'an arm',s, and to that arm, at a point, t, distant from the center ot motion the same as the point 1', one end of a second connecting-rod, H, is hung, its other end hung to the arm o, as at u. These points of connection orjoints are made in the usual manner of making joints of connecting-rods.

The operation ofthe invention is as follows: Supposing the reciprocating movement to be a 8o common steam-engine, and starting from the position in Fig. l, which is the most forwardposition ofthe piston, and the piston movin gto the rear to its iirst quarter or half throw, as seen Y in Fig. 1, the arms p s will be turned to bring their respectivo points r t diametrically opposite each other in a horizontal line. This will throw the slide or point m to its extreme rear position,andtheconnecting-rodHwill ldraw the lower end of the arm or point u to its extreme 9o forward position, and which, through the connecting-rod E, will throw the crank or pointf to its extreme rear position, or opposite point to which it started, and lwill havemade onehalf revolution ofthe driving-shaft, while the piston has moved but one-half its extent. The piston, continuing its movement, carries the point b to its opposite or eXtreme forward position, as seen in Fig. 2. This quarter movement,turningthe arm a to the position b, brings roo the point t up and the opposite point, r, down, and draws the slide or point m to its extreme rear position, th rowing the pointu forward and the point Zrearward, which brings the crank or point fback to its point of starting, while the piston has only traveled from one end of its cylinder to the other, or one-half of the reciprocating movement only has been performed. The piston returning, and when at the third quarter of its movement, or one-half itsreturn, the points are brought again to the position as seen in Fig. 3, and one-half the revolution ofthe pointf has been made. Continuing to its other extreme and completing the reciprocating movement, the parts are brought again to the position as seen in Fig. 1, and completes the second revolution of the drivingshaft or pointf. Hence it will be seen thatby one complete reciprocation two full revolutions have been produced.

The piston or power which imparts the reciprocating motion does not at any time come to a dead-point at either end of its stroke, because the extent of oscillation or vibration of the point b is less than one-half a full circle.

Applied to a steam-engine this mechanism imparts tothe driving-shaft two revolutions foreach full reci procation of the piston-a great advantage where rapid revolution of the driving-shaft is desirable. This illustration as applied to a steam-engine willbe sufficient to enable those skilled in the art to which this invention pertains to apply it to other machinery where it is required to convert reciprocating into rotary motion.

I have described the connections with the rock-shaft as made by arms; but it will be understood that this may be a wheel and the connecting-rods attached to the wheel instead of to arms. I therefore use the term arms in a general sense and as embracing all equivalents therefor.

I claim- 1. The herein-described mechanical movement, consisting of a rock-shaft to which a vihratory movement is imparted from a reciprocating power, a crank arranged for full revolution, a slide between said crank and rock-shaft carrying an arm hung thereto, so as to vibrate in a plane parallel with the planein which the crank swings, with a connectingrod from the said crank to oncend of said arm, and a connecting-rod from the opposite end of said arm to an arm extending from said rockshaft, and a connecting-rod from an arm extending in the opposite direction from said rock-shaft to the center of motion of the arm to which the crank connecting rod is attached, substantially as described.

2. The herein-described method for converting reciprocating into rotary motion, consisting of ay rock-shaft to which a reciprocating movement imparts oscillation less than halt of a full revolution, with a shaft having a crank thereon arranged for full revolution, and intermediate mechanism, substantiallysuch as described, whereby the rotation or oscillation of the rock-shaft in one direction imparts a full revolution to the crank, and on its return imparts a second revolution tothe crank,sub stantially as described.

ARTHUR E. RUST.

Witnesses:

SoLoN R. RUST, DWIGHT S. LOVELAND, E. H. STARR. 

